10, 20, 30, 40, ?
Rule applied to find the next number?

Subtraction of 20

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Addition of 20

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Addition of 10

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Multiplication of 10

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Solution

The correct option is C Addition of 10
Rule applied to the series
10, 20, 30, 40 is addition of 10

$20 = 10 + 10$ .
30 = 20 + 10.
40 = 30 + 10.

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